UPDATE: August 21st, 10am -- McDonald's has apparently deleted the tweets featuring the "stolen" images. We've included screenshots below.
UPDATE: August 20th, 7pm -- McDonald's has told Thrillist, "This shouldn’t have happened and, with our agency partner, we’re working to find out how it did. We’re reaching out to David Sikorski & Kristina Bakrevski. We apologize to them, their fans and ours."